Flexible mica-glass fiber GFК-T, GFК-TТ

Flexible mica-glass fiber GFК-T, GFК-TТ GOST 8727-78

Flexible mica-glass fiber of GFК-T and GFК-TТ grades is represented by a sheet electric insulating material based on phlogopite mica, glass fiber and organosilicon binder.
The sheets are (860±20) mm long, from 500 to 680 mm wide. The thickness for GFK-T is from 0,22 to 0,5 mm, for GFK-TT is from 0,2 to 0,6 mm.

Application: Flexible mica-glass fiber of GFК-T and GFК-TТ grades is to apply as slot insulation for electrical machine and banding insulation of the anchors at a temperature up to 180°C.

Thickness
 Electric strength, at least, at (15-35)°С 45-75%, kV/mm Mass fraction of components, %
Grade 0,15-0,25 0,3 0,35 0,4 0,45 0,5 0,6 СBinder Mica Volatile substances, not more than
GFК-T 20 20 – 17 – 17 17 20-36 Not less than 45 2
GFК-ТТ 20 18 18 17 – 17 17 20-36 Not less than 35 2